i JUST TRIED IT FROM THE GNOME TERMINAL INSIDE A MESSAGE WHILE READING
MAIL WITH MUTT AND i HAD NO PROBLEMS; i CAME UP WITH THE USUAL CONTEXT
MENU WITH NEARLY A DOZEN OPTIONS TO CHOOSE FROM. i JUST DID IT ONCE
BUT IT DID WORK FOR ME.

Can you please try to open the contextmenu of trash on your desktop?
Or opening the context menu of storage devices under computer?
This didn't work on my machine here.
BR.
halim